Saturn’s largest moon has enough energy to run a colony
Just in time for summer movie season comes news that something huge is lurking out there at the edge of the solar system. It’s really big. It’s never before been detected. It’s warping gravity fields.
No, it’s not the latest Michael Bay disaster-fest or the mothership from “Independence Day.” It’s not the hypothesized Planet 9 that everyone was talking about a little over a year ago. Probably it’s another planet. Or maybe that mothership.
Back in 2016, the Internet was all atwitter with the news that astronomers believed they had located another planet at the edge of the solar system. Planet 9, as they called it, was discovered through a study of disturbances in the orbits of Sedna and other less-than-planet-size objects out there in the vicinity of Pluto (which was a planet when most of us were kids and now isn’t).
This area is known as the Kuiper Belt. Astronomers, who don’t like to waste mental energy deciding what to call things they study, have a name for objects in the Kuiper Belt: Kuiper Belt Objects. It is through modeling the movement of these KBOs (see what I mean?) that the search for Planet 9 has proceeded. Nobody has seen Planet 9 yet, even with the most powerful telescopes, although with the help of millions of citizen astronomers, researchers have narrowed the field of possible suspects.
Anyway, it turns out that Planet 9 is not the only massive object out there warping the orbits of the KBOs. According to soon-to-be-published research by Kat Volk and Renu Malhotra of the University of Arizona, there’s another one. It’s called . . . well, it doesn’t have a name yet, but we can make a good guess.
Malhotra has such a nice way with an explanation that she could play the scientist in the movie version:
“Imagine you have lots and lots of fast-spinning tops, and you give each one a slight nudge . . . If you then take a snapshot of them, you will find that their spin axes will be at different orientations, but on average, they will be pointing to the local gravitational field of Earth.”
“We expect each of the KBOs’ orbital tilt angle to be at a different orientation, but on average, they will be pointing perpendicular to the plane determined by the sun and the big planets.”
Only the angles are wrong. They’re warped in a slightly different direction, as they would be if the gravity of another planet were affecting them. But Planet 9, wherever it is, would be too far away to have the effects they have found. So there is almost certainly another mass out there. (The researchers estimate only a 1 percent to 2 percent possibility that the measurements represent a statistical fluke.)
You don’t have to be a science nerd to be fascinated. You can be a garden-variety sci-fi fan. Or you could just happen to like disaster movies.
The researchers tell us that these unseen planets are rogues. At some point they wandered into the solar system, and were captured by the gravity of Sol, our puny little sun. Now they’re stuck in orbit, messing with our calculations.
Maybe. But maybe not. Let’s sit back and don our 3-D glasses and grab a handful of popcorn (or perhaps don our foil hats) as we take a moment to consider a more sobering possibility. Here’s the thing to remember about rogue planets: They’re not just wanderers; they can be destroyers, too. Simulations tell us that some 60 percent of rogue planets that enter the solar system would bounce out again. But in 10 percent of cases, the rogue will take another planet along as it departs.
Just like that, Neptune is gone. Or Mars. Or, you know, us.
Tell me that’s not a weapon of interstellar war. (OK, fine, the capture of another planet would take hundreds of centuries. So it’s a weapon of war for a very patient species. Or one that perceives time differently. But how do we know it’s not already happening? Anyway, never mess with the narrative!)
And there’s something else for the sci-fi paranoiac to chew on along with the popcorn. The sequence. In early 2016, astronomers find a disturbance in the Kuiper Belt Objects and think “planet.” Fine, natural phenomenon. Then this year, they find another disturbance and think “another planet.” Fine, natural phenomenon. Then how is it that we never noticed before? Maybe the disturbances are . . . recent. So if by chance we’re soon told of a third disturbance, then by the James Bond theory of conspiracy it’s enemy action.
Cue heavy overdone music. Cue our most powerful weapons having no effect. Cue a broken family trying to reunite. Cue Roland Emmerich. I mean, somebody’s got to make this movie, right? I’ll be there on opening day.
“It’s very real, and it as a lot to do with dosage,” confirms Dustin Sulak, DO, a medical cannabis expert based in Maine. So, smoking a little too much can absolutely make your morning miserable.
Plenty of people who use cannabis, either recreationally or medically, approach it with a “more is better” mentality. In truth, “most people will get relief from symptoms at a dose that’s lower than what would cause intoxication,” Dr. Sulak says. So, if you’re using marijuana to treat a health issue, you don’t necessarily need to feel high to get the benefits. And even if you’re using it specifically to enjoy a high, there’s no real need to go ham — you’ll probably be better off the next day if you, well, chill a little bit.
Any time you’re consuming cannabis, your body’s cannabinoid receptors are being activated and, essentially, overstimulated. To counteract that, the receptors are pulled into the cells and become inactive, Dr. Sulak explains. But that doesn’t just make them inactive to the THC you’re inhaling, it also means the endocannabinoid compounds that naturally occur in your body aren’t going to be able to bind to those receptors, either.
Under normal circumstances, your body can balance this out, and there’s no real harm. But, if you ingest enough, you could wake up in a state of cannabinoid withdrawal, Dr. Sulak says. “By using a high dose late in the night, what we’re left with is a feeling of deficiency.” That, combined with weed’s well-documented dehydrating effects, can make you an extremely unhappy camper the next day.
What can you do about it? Treating a weed hangover is a lot like treating a normal one, it turns out. Your first priority is going to be getting rehydrated. After that, you can either wait your symptoms out or, if your life circumstances allow, consume a small dose of cannabis to counteract your withdrawal symptoms. On the other hand, if you wake up and still feel a bit intoxicated, Dr. Sulak suggests taking a some CBD or consuming a high-CBD cannabis strain to counteract the effects.
Beyond that, though, it’s worth taking a good look at your long-term cannabis habits. “If you’re having a weed hangover, it’s a sign you’re not using cannabis optimally,” Dr. Sulak says. So, he recommends new users try using a dose that produces the most minimal (yet noticeable) effects for about three days before upping their consumption. And, for veteran users, he suggests abstaining from weed for two days before finding their minimal dose. Both of these protocols help your body build up a tolerance to the negative side effects of marijuana while also making you more sensitive to the positive effects, Dr. Sulak explains.
“It’s a very forgiving and sustainable medicine,” he says. So it’s worth taking the time to find the way to use it that works the best for you — without feeling like crap the next day.
no way are we encouraging illegal activity and would like to remind its readers that marijuana usage continues to be an offense under Federal Law, regardless of state marijuana laws.
By Pallab Ghosh
Prof Hawking says: “If humanity is to continue for another million years, our future lies in boldly going where no one else has gone before.”
Prof Stephen Hawking has called for leading nations to send astronauts to the Moon by 2020.
They should also aim to build a lunar base in 30 years’ time and send people to Mars by 2025.
Prof Hawking said that the goal would re-ignite the space programme, forge new alliances and give humanity a sense of purpose.
He was speaking at the Starmus Festival celebrating science and the arts, which is being held in Trondheim, Norway.
Spreading out into space will completely change the future of humanity
Prof Stephen Hawking
“Spreading out into space will completely change the future of humanity,” he said.
“I hope it would unite competitive nations in a single goal, to face the common challenge for us all.
“A new and ambitious space programme would excite (young people), and stimulate interest in other areas, such as astrophysics and cosmology”.
Moon LandingsImage copyrightNEIL A. ARMSTRONG
Return of the Moon landings would give humanity “a sense of purpose”.
He addressed the concerns of those arguing that it would be better to spend our money on solving the problems of this planet along with a pointed criticism of US President Donald Trump.
“I am not denying the importance of fighting climate change and global warming, unlike Donald Trump, who may just have taken the most serious, and wrong, decision on climate change this world has seen,” he said.
Prof Hawking explained that human space travel is essential for the future of humanity precisely because the Earth was under threat from climate change as well as diminishing natural resources.
“We are running out of space and the only places to go to are other worlds. It is time to explore other solar systems. Spreading out may be the only thing that saves us from ourselves. I am convinced that humans need to leave Earth,” the Cambridge University theoretical physicist explained.
The head of the European Space Agency (Esa) Jan Woerner has said he envisages the construction of a Moon base to replace the International Space Station in 2024 and is collaborating with Russia to send a probe to assess a potential site. China has set itself the goal of sending an astronaut to the Moon.
Nasa has no plans to return to the Moon, instead focusing its efforts on sending astronauts to Mars by the 2030s. Though if other space agencies begin to collaborate on constructing a lunar base it would be hard to see Nasa not participating.
Prof Hawking said that there was no long-term future for our species staying on Earth: it would either be hit by an asteroid again or eventually engulfed by our own Sun. He added that travelling to distant worlds would “elevate humanity”.
Media captionIn this European Space Agency video Dr James Carpenter describes the landing site
“Whenever we make a great new leap, such as the Moon landings, we bring people and nations together, usher in new discoveries, and new technologies,” he continued.
“To leave Earth demands a concerted global approach, everyone should join in. We need to rekindle the excitement of the early days of space travel in the sixties.”
He said that the colonisation of other planets was no longer science fiction, though he did pay tribute to the genre in his closing remarks.
“If humanity is to continue for another million years, our future lies in boldly going where no one else has gone before.
“I hope for the best. I have to. We have no other option”.
FREE YOUR MIND
You might wonder, at some point today, what’s going on in another person’s mind. You may compliment someone’s great mind, or say they are out of their mind. You may even try to expand or free your own mind.
But what is a mind? Defining the concept is a surprisingly slippery task. The mind is the seat of consciousness, the essence of your being. Without a mind, you cannot be considered meaningfully alive. So what exactly, and where precisely, is it?
Traditionally, scientists have tried to define the mind as the product of brain activity: The brain is the physical substance, and the mind is the conscious product of those firing neurons, according to the classic argument. But growing evidence shows that the mind goes far beyond the physical workings of your brain.
No doubt, the brain plays an incredibly important role. But our mind cannot be confined to what’s inside our skull, or even our body, according to a definition first put forward by Dan Siegel, a professor of psychiatry at UCLA School of Medicine and the author of a recently published book, Mind: A Journey to the Heart of Being Human.
He first came up with the definition more than two decades ago, at a meeting of 40 scientists across disciplines, including neuroscientists, physicists, sociologists, and anthropologists. The aim was to come to an understanding of the mind that would appeal to common ground and satisfy those wrestling with the question across these fields.
After much discussion, they decided that a key component of the mind is: “the emergent self-organizing process, both embodied and relational, that regulates energy and information flow within and among us.” It’s not catchy. But it is interesting, and with meaningful implications.
The most immediately shocking element of this definition is that our mind extends beyond our physical selves. In other words, our mind is not simply our perception of experiences, but those experiences themselves. Siegel argues that it’s impossible to completely disentangle our subjective view of the world from our interactions.
“I realized if someone asked me to define the shoreline but insisted, is it the water or the sand, I would have to say the shore is both sand and sea,” says Siegel. “You can’t limit our understanding of the coastline to insist it’s one or the other. I started thinking, maybe the mind is like the coastline—some inner and inter process. Mental life for an anthropologist or sociologist is profoundly social. Your thoughts, feelings, memories, attention, what you experience in this subjective world is part of mind.”
The definition has since been supported by research across the sciences, but much of the original idea came from mathematics. Siegel realized the mind meets the mathematical definition of a complex system in that it’s open (can influence things outside itself), chaos capable (which simply means it’s roughly randomly distributed), and non-linear (which means a small input leads to large and difficult to predict result).
In math, complex systems are self-organizing, and Siegel believes this idea is the foundation to mental health. Again borrowing from the mathematics, optimal self-organization is: flexible, adaptive, coherent, energized, and stable. This means that without optimal self-organization, you arrive at either chaos or rigidity—a notion that, Siegel says, fits the range of symptoms of mental health disorders.
Finally, self-organization demands linking together differentiated ideas or, essentially, integration. And Siegel says integration—whether that’s within the brain or within society—is the foundation of a healthy mind.
Siegel says he wrote his book now because he sees so much misery in society, and he believes this is partly shaped by how we perceive our own minds. He talks of doing research in Namibia, where people he spoke to attributed their happiness to a sense of belonging.
When Siegel was asked in return whether he belonged in America, his answer was less upbeat: “I thought how isolated we all are and how disconnected we feel,” he says. “In our modern society we have this belief that mind is brain activity and this means the self, which comes from the mind, is separate and we don’t really belong. But we’re all part of each others’ lives. The mind is not just brain activity. When we realize it’s this relational process, there’s this huge shift in this sense of belonging.”
In other words, even perceiving our mind as simply a product of our brain, rather than relations, can make us feel more isolated. And to appreciate the benefits of interrelations, you simply have to open your mind.
Spurred by technology advances and demand for transportation alternatives in increasingly congested cities, entrepreneurs around the globe are vying to become the first to develop a commercially viable “flying car.” The designs vary greatly, and most aren’t actually cars capable of driving on roads. Here are some examples:
European aircraft manufacturer Airbus is working at its Silicon Valley research center on a driverless flying taxi that at first will have a pilot, but will later be autonomous. The vertical takeoff-landing, all-electric aircraft is a cockpit mounted on a sled and flanked by propellers in front and back. Airbus plans to test a prototype before the end of 2017, and to have the first Vahanas ready for production by 2020.
Israeli tech firm Urban Aeronautics originally designed its people-carrying drone as an “air mule” for military use. It takes off vertically and has a standard helicopter engine, but no large main rotor. Its lift comes from two fans buried inside the fuselage. Two smaller ducted “fans” mounted in the rear provide forward movement. It can fly between buildings and below power lines, attain speeds up to 115 mph, stay aloft for an hour and carry up to 1,100 pounds
German technology company Lilium Aviation is working on a two-seater aircraft that will take off vertically using 36 electric fan engines arrayed along its wings. The aircraft will hover and climb until the fans are turned backward slowly. After that, it flies forward like a plane using electric jet engines. The company has been flight-testing small scale models. The aircraft will have an estimated cruising speed of up to 190 mph and a range of 190 miles.
The Slovakian company AeroMobil has developed a car with wings that unfold for flight. It uses regular gasoline and fits into standard parking spaces. It can also take off from airports or “any grass strip or paved surface just a few hundred meters long,” according to the company’s website. Driver and pilot licenses will be required.
Chinese drone maker EHang has been flight-testing a person-carrying drone in Nevada. The vehicle is a cockpit with four arms equipped with rotors. Takeoff and landing targets are pre-programmed. A command station in China will be able to monitor and control the aircraft anywhere in the world, company officials say.
Joby Aviation of Santa Cruz, California is developing a two-seat, all-electric plane with 12 tilt rotors arrayed along its wings and tail. The aircraft takes off and lands vertically and can achieve speeds up to 200 mph, according to the company’s website.
Terrafugia, based in Woburn, Massachusetts, began working a decade ago on a car folding wings that can fly or be driven on roads that’s called the Transition. The company says it plans to begin production of the Transition in 2019. Terrafugia is also working on a “flying car” called the TF-X — a car with folding arms and rotors for vertical takeoff and landing.
This two-seater, electric multicopter from German company e-volo has 18-rotors and looks like a cross between a helicopter and a drone. It is controlled from the ground, eliminating the need for a pilot license.
This Mountain View, California, aircraft developer bankrolled by Google co-founder Larry Page says on its webpage that it is working on a “revolutionary new form of transportation” at the “intersection of aerodynamics, advanced manufacturing and electric propulsion.” Company officials declined to provide details about Zee’s projects.
Washington (AFP) – A “strong signal” detected by a radio telescope in Russia that is scanning the heavens for signs of extraterrestrial life has stirred interest among the scientific community.
“No one is claiming that this is the work of an extraterrestrial civilization, but it is certainly worth further study,” said Paul Gilster, author of the Centauri Dreams website which covers peer-reviewed research on deep space exploration.
The signal is from the direction of a HD164595, a star about 95 light-years from Earth.
The star is known to have at least one planet, and may have more.
The observation is being made public now, but was actually detected last year by the RATAN-600 radio telescope in Zelenchukskaya, Russia, he said.
Experts say it is far too early to know what the signal means or where, precisely,it came from.
“But the signal is provocative enough that the RATAN-600 researchers are calling for permanent monitoring of this target,” wrote Gilster.
The discovery is expected to feature in discussions at the 67th International Astronautical Congress in Guadalajara, Mexico, on September 27.
“Working out the strength of the signal, the researchers say that if it came from an isotropic beacon, it would be of a power possible only for a Kardashev Type II civilization,” Gilster wrote, referring to a scale-system that indicates a civilization far more advanced than our own.
“If it were a narrow beam signal focused on our Solar System, it would be of a power available to a Kardashev Type I civilization,” indicating one closer to Earth’s capabilities.
Gilster, who broke the story on August 27, said he had seen a presentation on the matter from Italian astronomer Claudio Maccone.
“Permanent monitoring of this target is needed,” said the presentation.
Nick Suntzeff, a Texas A&M University astronomer told the online magazine Ars Technica that the 11 gigahertz signal was observed in part of the radio spectrum used by the military.
“If this were a real astronomical source, it would be rather strange,” Suntzeff was quoted as saying.
“God knows who or what broadcasts at 11Ghz, and it would not be out of the question that some sort of bursting communication is done between ground stations and satellites,” Suntzeff said.
“I would follow it if I were the astronomers, but I would also not hype the fact that it may be at SETI signal given the significant chance it could be something military.”
“God knows who or what broadcasts at 11Ghz.
A large global study of more than 12,000 first-time heart-attack patients found a strong link between the attack and what the patients were doing and feeling in the hour preceding the event.
The study, published in the journal Circulation, found that being angry or emotionally upset more than doubled the risk of suffering a heart attack. Performing heavy physical activity in a highly emotional state more than tripled the risk. The researchers compared people’s behavior in the 60 minutes before the onset of heart-attack symptoms with the same one-hour period 24 hours earlier.
The results, based on an analysis of heart-attack patients in 52 countries, were consistent regardless of other, traditional cardiovascular risk factors, such as obesity, high blood pressure and diet.
Intense physical activity and negative emotions can increase heart rate and blood pressure, which reduces the supply of blood and oxygen to the heart, the researchers said. This can cause arterial plaque to rupture and trigger an acute myocardial infarction, or heart attack, they said.
Previous studies have found links between heart-attack risk and anger, stress, physical activity—even extreme happiness. But these mostly involved a small number of subjects from Western countries, the researchers said.
In the hour before the first symptoms, 13.6 percent were engaged in heavy physical exertion, compared with 9.1 percent on the previous day. Feelings of anger or being emotionally upset were reported by 14.4 percent and 9.9 percent during the same periods, respectively. The majority of heart attacks occurred between 6 a.m. and 6 p.m.
China plans to become the first nation to land a probe on the far side of the Moon, according toXinhua News Agency, the country’s official press organization.
Launching possibly as early as 2018, the mission represents the next step in China’s plans to explore the Moon with robotic probes and, within the next decade, to return a couple of kilograms of lunar material to Earth. The proposed Chang’e-4 probe follows the successful soft landing of the Chang’e-3 probe on the near side of the Moon in December 2013.
Although the new probe was built as the engineering backup to the Chang’e-3 lander, Chinese officials said the structure could handle a larger payload. China plans to use the probe to study “geological conditions” on the far side of the moon. The Chang’e probes are named after the Chinese goddess of the Moon.China has also offered foreign countries the opportunity to participate in its lunar exploration programs. In contrast to NASA, Europe and Russia have both signaled their interest in further studying the Moon and likely landing humans there, before moving on to Mars. Many countries and businesses see potential value in ice at the lunar poles and rare minerals in the lunar soil. The US Congress recently passed a law to legalize the mining of these resources.
Humans have studied the far side of the Moon from above since 1959, when the Soviet Union’s Luna 3 spacecraft returned the first grainy images of its pockmarked surface. But no humans or robotic spacecraft have yet landed there.
Making sense of the latest shakeup at Roscosmos.